R0, R1 clutter correction

In this case, CCOR is estimated from the following formula:

{C C O R}_{e s t} = 10 \log [\frac{R_{0}}{T_{0}}] = 10 \log [\frac{S + N}{C + S + N}] = 10 \log [\frac{1 + \frac{1}{S N R}}{C S R + 1 + \frac{1}{S N R}}]

Here, the expression is strictly valid only when the signal-to-noise ratio (SNR=S/N) is large.

When the 2-lag approach is used, the clutter corrections are not as accurate for weak weather signals. However, the error is typically less than 3 dB.